碩士 / 國立臺灣海洋大學 / 環境生物與漁業科學學系 / 103 / Mugilidae is a group fishes living widely in tropical, sub-tropical and temperate coastal and estuaries in the world who have good abilities to adapt variety of environment and salinities. Therefore, these fishes are one of the most important food fish around the world. The aquaculture of mullet is very important in Taiwan, especially for flathead mullet (Mugil cephalus) which not only provide fish meat but also fish row which brought fishman a plentiful benefit every year. Despite the ecological and economical importance of grey mulle, the taxonomy and evolutionary relationships among the species so far remains largely unresolved. A major reason is that most morphological characters used in species identification classically are remarkably similar within the family. Especially during larval and juvenile stages which makes the reliable evidences deficiency for mullet resources investigation, utilization, conservation and management precisely. There were five genera and ten species of mugilid fishes recognized in Taiwan. Most species are living in the sandy coastal, estuaries, lagoon and mangroves while some speices living in rocky shore and coral reefs. According to the progress of molecular biology and biotechnology, there are many methods developed for species identificatoin. Multiplex COI haplotype-specific PCR (MHS-PCR) is one example. This method dependent on the DNA barcode of Mugilidae fishes for species specific primers design. We can identify the species rapidly based on the size of their PCR products.
In this study, the molecular phylogenetic analysis using COI sequences suggested that there may have 6 genus and 16 species of Mugilidae in Taiwan and three of them are new species. Mugil cephalus is the most ancestral species of Muglidae in Taiwan who can be further divided into three cryptic species. Oedalecheila labiosus and Ellochelon vaigiensis are very different in morphology but are closer in genetics analysis. Valamugil seheli should be assigned in the same genus with Crenimugil crenilabis. Moolgarda perusii and Moolgarda cunnesius should be assigned to the genus Osteomugil. Genus Planiliza have more species and most of them are very similar in morphology, it is very difficult to identify them through morphology. In the situation of high fish diversity and high rate of cryptic species in Mugilidae in Taiwan, molecular systematics will be a fast, cheap and pricisely tool for species identification. The establishment of mullet barcode database can make species identification in research, aquaculture, fishery utilization and management more scientificaly.
| Identifer | oai:union.ndltd.org:TW/103NTOU5451020 |
| Date | January 2015 |
| Creators | Lin, Yi-Lin, 林宜玲 |
| Contributors | Joung, Shoou-Jeng, Shen, Kang-Ning, 莊守正, 沈康寧 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 52 |
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